Noise deadener for typewriting machines



?atented May 20, 1924.

'' UNITED STATES PATENT OFFICE.

Norse nmnmmn roa rrrnwarrme MACHINES.

Application filed larch 12, 1928. Serial No. 824,878.

To all whom it may concern:

Be it known that I, WILLIAM DOUDEN, a citizen of the United States, residing at 1840 Biltmore St., in Washington, District 5 of Columbia, have invented certain new and useful Improvements in Noise Deadeners for Typewriting Machines, of which the following is a specification.

My invention relates to noise deadeners 1 for typewriting machines which may be readily introduced between the platen and" the paper simultaneously with the paper.

One of the objects of mv invention is the production of a device which may be em- 1 ployed in the ordinary t writing machine and which will up recia Fy reduce the noise of the operation t ereof.

Another object of the invention is the provision of a noise deadener for a type- 2 writing machine which will also serve as a protection for the platen thereof.

Another object of the invention is the production of a device which will improve the impressions of-the carbon copies and which will at the same time assist in holding the several sheets of pa er and carbons together while they are ing fed into and throu 'h the machine.

A Further object of the invention is the production of a device which will soften the touch of the keys to the finger tips.

I attain the above and other objects of the invention by means of the device illustrated in the accompanying drawing, being a perspective view 0 the device, in which:

A represents amoderatel hard, resilient, pliable material such as ce luloid; B represents a sheet of chamois skin, felt, soft rubber or similar cushioning material which. is made closely adherent to the sheet of celluloid by means of a suitable adhesive.

The celluloid sheet has a portion of its top edge turned down, as shown at C, in order to receive the sheets of paper and to hold them in osition while they are being fed through t 1e machine. As many as six sheets of paper and five carbons may be used with this device and can,be removed from and fed again into the t pewriting machine without any change in t e alignment of the sheets. As an obvious modification, to es might be cut out from the sheet of cellu did and bent away from the main sheet in order to provide clips for the same purpose as the turned over edge C.

In the use of the article, the soft backing not only serves as a protection for the roller, deadens the sound of the keys, but also, because of the cushioning action it provides for the character carriers, protects the finger tips ofthe operator. The relatively smooth, hard surface of the celluloid sheet against which the paper rests materially aids in making a clear impression, while the cushioning material deadens the sound of the keys striking against the device. It isalso within the scope of my invention to roughen the surface of the celluloid slightly in order to prevent slippage of the paper which rests against it.

While the use of chamois skin and celluloid is preferable, it is obvious that other materia s might be employed as substitutes therefor, for instance, felt, rubber or cloth might be used in place of chamois skin, while hard rubber might be substituted-for the celluloid. Another desirable substance to be used in place of the celluloid is material such as employed as a backing for photographic films, especially that known y the trade name of kodaloid.

If a transparent material such as celluloid is employed, the under side of the sheet might be printed with data, rules, tables or an advertlsement, thus making the device serve several useful pur oses.

' Having fully descri ed my invention, what I c aim and desire to secure by Letters Patent is 1. A noise deadener for typewriting machines adapted to be inserted into the machine simultaneously with the paper comprising a sheet of exible, smooth surfaced material and a sheet of cushioning material closely adherent to said first named sheet.

2. A noise deadener for typewriting machines comprising a sheet of flexible material and a sheet of cushioning material adherin thereto, said first named sheet being provided with pa 'er retaining means.

3. As an artlc e of manufacture, a sheet of relativel hard, .flexible material and a sheet of oils ionin material, said sheets befastened toge er, the combined thickness of which heing'such as to permit their easy insertion into the typewritmg machine betweenthe laten and the paper ously with t e paper.

4. A noise deadener simultanefor typewriting machines adapted to be readily introduced into the machine between the pape r and the 

